Studio Technologies M212-00151 - Manual (Page 32)

Issue 2, June 2006 Model 212 User Guide
Page 33 Studio Technologies, Inc.
Digital Audio Outputs
As has been previously discussed in this
user guide, the Model 212 is capable of
supporting three digital audio outputs.
Directly accessible on the back panel are
the BNC connectors for the AES3id output
and the bidirectional interface. Accessible
internally for installer-selected applications
is the AES3 output. It’s important to men-
tion that these three outputs are always
active, each sending out the identical
digital audio and control bit stream. While
most applications will use only one of the
outputs, there’s no reason why two, or all
three, can’t be utilized.
In addition, while the bidirectional digital
interface is intended to send and receive
data over a single cable, it can be used
as a standard AES3id output. The only
requirement is that the configuration for
the digital input source must be selected
for something other than the bidirectional
digital interface. This ensures that a stable
clock source will be available for the all the
digital outputs.
Channel Status Bits
Following the AES3 and AES3id standards,
the Model 212 configures the channel sta-
tus bits. The unit is defined as being a pro-
fessional device, the sample rate is set to
follow the actual sample rate, and the word
length is 24 bits. These settings are made
in the Model 212’s software and cannot be
changed in the field. This was specifically
done to help ensure reliable operation in
the field. The setting was carefully selected
to allow reliable operation in all intended
Model 212 applications.